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# IEEE Transactions on Microwave Theory and Techniques

## Issue 12  Part 1 • Dec. 2012

This issue contains several parts.Go to:  Part 2

## Filter Results

Displaying Results 1 - 25 of 31

Publication Year: 2012, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2012, Page(s): C2
| PDF (45 KB)
• ### Guest Editorial

Publication Year: 2012, Page(s): 3641
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• ### A Semianalytical Approach for a Nonconfocal Suspended Strip in an Elliptical Waveguide

Publication Year: 2012, Page(s):3642 - 3655
Cited by:  Papers (7)
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A problem of a nonconfocal suspended strip in an elliptical waveguide is analyzed by using a semianalytical approach, which is the so-called null-field boundary integral-equation method (BIEM). The null-field BIEM is proposed by introducing the idea of null field, degenerate kernels, and eigenfunction expansion to improve the conventional dual boundary-element method (BEM). A closed-form fundament... View full abstract»

• ### FDTD Modeling of Impedance Boundary Conditions by Equivalent LTI Circuits

Publication Year: 2012, Page(s):3656 - 3666
Cited by:  Papers (4)
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A circuit-based implementation of the Leontovich impedance boundary condition (IBC) is proposed. The surface impedance of a lossy medium is approximated by a series of first-order rational functions using the vector-fitting technique. Thus, an equivalent analogical circuit with lumped linear time-invariant parameters is derived, which is simply analyzed in time domain without performing any convol... View full abstract»

• ### Wideband Dual-Mode Microstrip Filter Using Short-Ended Resonator With Centrally Loaded Inductive Stub

Publication Year: 2012, Page(s):3667 - 3673
Cited by:  Papers (15)
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In this paper, a new class of wideband filters utilizing a novel dual-mode resonator is presented. For the first time, the resonator realized by loading an inductive short-circuited stub at the center of the short-ended resonator is proposed. The inductive stub is tuned to control the filter bandwidth by splitting two degenerate modes. For wideband application, source-load coupling, which is intro... View full abstract»

• ### Coupled Line 180$^{circ}$ Hybrids With Lange Couplers

Publication Year: 2012, Page(s):3674 - 3682
Cited by:  Papers (6)
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This paper presents 180° coupled line hybrids with noninterspersed inputs/outputs, which utilize Lange couplers. It demonstrates that, due to the near-TEM properties of the couplers, the asymmetry in power division found in previous work can be removed. A novel hybrid topology with increased layout flexibility and reduced substrate area is proposed and theoretically analyzed. Test circuits ... View full abstract»

• ### A Physics-Based Causal Bond-Wire Model for RF Applications

Publication Year: 2012, Page(s):3683 - 3692
Cited by:  Papers (4)
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A predictive causal physics-based compact model that describes the electrical behavior of multiple bond wires as a function of signal frequency and geometry of the wires is presented. It takes into account the inductive coupling between the wires, the frequency-dependent losses, and the capacitance between the wires and the ground plane. The model does not require any fitting parameters and places... View full abstract»

• ### A Novel Model for Implementation of Gamma Radiation Effects in GaAs HBTs

Publication Year: 2012, Page(s):3693 - 3698
Cited by:  Papers (3)
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For predicting the effects of gamma radiation on gallium-arsenide (GaAs) heterojunction bipolar transistors (HBTs), a novel model is presented in this paper, considering the radiation effects. Based on the analysis of radiation-induced degradation in forward base current and cutoff frequency, three semiempirical models to describe the variation of three sensitive model parameters are used for simu... View full abstract»

• ### On the Compression and Blocking Distortion of Semiconductor-Based Varactors

Publication Year: 2012, Page(s):3699 - 3709
Cited by:  Papers (2)
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The effective capacitance of variable reactors (varactors) can be modulated by the magnitude of applied RF signals, resulting in troublesome detuning issues in resonators constructed with these devices. In this paper, the fundamental causes behind these issues are investigated through the use of Volterra series. It is concluded that two major distortion mechanisms, namely, compression and blocking... View full abstract»

• ### High-Quality-Factor Active Capacitors for Millimeter-Wave Applications

Publication Year: 2012, Page(s):3710 - 3718
Cited by:  Papers (3)
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This paper presents single-ended and differential configurations of active capacitors that exhibit high-quality (Q) factor at millimeter-wave frequencies. Both structures provide a small tunable negative resistance that can be exploited to compensate for the loss of other components, such as inductors in millimeter-wave integrated circuits. Unlike passive capacitors, which exhibit increasin... View full abstract»

• ### Variable Reflection-Type Attenuators Based on Varactor Diodes

Publication Year: 2012, Page(s):3719 - 3727
Cited by:  Papers (3)  |  Patents (2)
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In this paper, variable reflection-type attenuators based on varactor diodes are introduced and described in detail. Their main components are 3-dB couplers, varactor diodes, and lumped elements. Initially, a simple varactor-based reflective load is introduced and its advantages and disadvantages in the circuit of reflection-type attenuators are discussed. Based on this, improvements and refinemen... View full abstract»

• ### Distributed Modeling of Six-Port Transformer for Millimeter-Wave SiGe BiCMOS Circuits Design

Publication Year: 2012, Page(s):3728 - 3738
Cited by:  Papers (5)
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In this paper, a six-port distributed model of on-chip single-turn transformers in silicon that can predict the features of the transformers up to 200 GHz is presented. Moreover, the proposed model is scalable with the diameter of the transformer. Based on the developed model, a transformer balun with improved differential-port balance is deployed in a D-band up-conversion mixer design in 0... View full abstract»

• ### A 64–84-GHz PLL With Low Phase Noise in an 80-GHz SiGe HBT Technology

Publication Year: 2012, Page(s):3739 - 3748
Cited by:  Papers (9)
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This paper presents a 64-84-GHz phase-locked loop (PLL) realized in a low-cost 80-GHz HBT technology. The circuit consists of a wide tuning-range voltage-controlled oscillator, a push-push frequency doubler, a divide-by-32 frequency divider, a phase detector and an active loop filter. The measured phase noise at 1-MHz offset is -106 dBc/Hz. The output power is -2.5 dBm at 64 GHz, and it slowly dec... View full abstract»

• ### Analysis and Design of Low Phase-Noise Oscillators With Nonlinear Resonators

Publication Year: 2012, Page(s):3749 - 3760
Cited by:  Papers (5)
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It is known that the dynamics and phase noise of resonator-based self-sustained nonlinear oscillators is affected by the presence of a nonlinear resonator. In fact, it has been shown that resonator nonlinearity can enhance the oscillator phase noise under certain conditions. This paper offers a new formulation and analytical approach to describe the effect of resonator nonlinearity on the phase no... View full abstract»

• ### Broadband CMOS Millimeter-Wave Frequency Multiplier With Vivaldi Antenna in 3-D Chip-Scale Packaging

Publication Year: 2012, Page(s):3761 - 3768
Cited by:  Papers (8)
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This paper describes a frequency multiplier able to emit a broadband signal with a frequency range from 70 GHz up to at least 170 GHz. The device is composed of a nonlinear transmission line (NLTL) implemented in commercial CMOS 65-nm technology and an off-chip Vivaldi antenna. These two elements are packaged together with a 3-D chip-scale packaging technology. Characterization of the whole device... View full abstract»

• ### Design and Analysis of Digital-Assisted Bandwidth-Enhanced Miller Divider in ${hbox {0.18-}}mu{hbox {m}}$ CMOS Process

Publication Year: 2012, Page(s):3769 - 3777
Cited by:  Papers (5)
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A bandwidth-enhanced technique for a Miller divider is presented in this paper. The proposed frequency divider consists of a band-switched Miller divider and digital-assisted circuit to switch the resonator automatically. The proposed frequency divider is implemented in 0.18-μm CMOS technology and has a measured 57.4% bandwidth from 8.2 to 14.8 GHz at an input power of 0 dBm. The dc consump... View full abstract»

• ### Theory and Design of Class-J Power Amplifiers With Dynamic Load Modulation

Publication Year: 2012, Page(s):3778 - 3786
Cited by:  Papers (14)
| | PDF (2315 KB) | HTML

A theory for class-J microwave amplifier operation as a function of drive level and fundamental load impedance is derived. Calculations show that, under appropriate operating conditions, it is sufficient to modulate the transistor load reactance to enable high-efficiency operation (>;70%) over a large output power dynamic range (>;10 dB) with high transistor power utilization. Such dynamic l... View full abstract»

• ### Widely Tunable High-Efficiency Power Amplifier With Ultra-Narrow Instantaneous Bandwidth

Publication Year: 2012, Page(s):3787 - 3797
Cited by:  Papers (5)
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This paper reports the first power amplifier (PA) that simultaneously achieves a very narrow instantaneous bandwidth (2%) while being tunable over a 38.5% frequency range (2.1-3.1 GHz) with a measured 50%-60% efficiency in the entire band. Such PAs are in great demand for realizing all-digital burst-mode transmitters that are expected to become critical for the future generation of wireless commun... View full abstract»

• ### An 8-bit Integrate-and-Sample Receiver for Rate-Scalable Photonic Analog-to-Digital Conversion

Publication Year: 2012, Page(s):3798 - 3809
Cited by:  Papers (2)
| | PDF (2310 KB) | HTML

Jitter limitations pose significant challenges for high-resolution and sampling-rate analog-to-digital converters (ADCs). This paper describes an integrate-and-sample (IAS) receiver suitable for use in an optical parametric photonic ADC. Rate-scalable photonic-sampling techniques provide low-jitter optical sampling and analog-to-digital conversion of the wideband signal up to 10 GHz and beyond. An... View full abstract»

• ### Analog Signal Processing for Pulse Compression Radar in 90-nm CMOS

Publication Year: 2012, Page(s):3810 - 3822
Cited by:  Papers (8)
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This paper presents a pulse-compression radar baseband analog signal processing integrated in a silicon process for low cost and power dissipation. The analog signal-processing circuitry exhibits the autocorrelation properties of the polyphase codes, maximizes the sensitivity and resolution of a pulse radar system, and alleviates speed and resolution requirements of the analog-to-digital converter... View full abstract»

• ### 245-GHz LNA, Mixer, and Subharmonic Receiver in SiGe Technology

Publication Year: 2012, Page(s):3823 - 3833
Cited by:  Papers (17)  |  Patents (1)
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A four-stage common-base (CB) 245-GHz low-noise amplifier (LNA) and a fourth subharmonic 245-GHz transconductance mixer are presented. An integrated subharmonic receiver for sensing applications in the 245-GHz industrial-scientific-medical band is proposed. The receiver consists of a single-ended CB LNA, a fourth transconductance subharmonic mixer, a 60-GHz push-push voltage-controlled oscillator ... View full abstract»

• ### CMOS Integrated Antenna-Coupled Field-Effect Transistors for the Detection of Radiation From 0.2 to 4.3 THz

Publication Year: 2012, Page(s):3834 - 3843
Cited by:  Papers (56)
| | PDF (2204 KB) | HTML

This paper reports on field-effect-transistor-based terahertz detectors for the operation at discrete frequencies spanning from 0.2 to 4.3 THz. They are implemented using a 150-nm CMOS process technology, employ self-mixing in the n-channels of the transistors and operate well above the transistors' cutoff frequency. The theoretical description of device operation by Dyakonov and Shur is extended ... View full abstract»

• ### A Unified Theory for $S$-Parameter Uncertainty Evaluation

Publication Year: 2012, Page(s):3844 - 3855
Cited by:  Papers (9)
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An analytical approach to compute the uncertainty of multiport scattering parameter measurements is presented. First, the various uncertainty causes from the noise to the standard definitions are modeled and characterized, then the uncertainty propagation up to the device-under-test measurement is computed. Experiments confirm the validity of this general approach. View full abstract»

• ### An Ultra-Thin, High-Power, and Multilayer Organic Antenna Array With T/R Functionality in the $X$-Band

Publication Year: 2012, Page(s):3856 - 3867
Cited by:  Papers (6)
| | PDF (2522 KB) | HTML

The transmit-receive (T/R) operation of an ultra-thin organic antenna array is presented at a center frequency of 9.5 GHz. High transmit power is achieved while maintaining an ultra-low profile in a novel system-on-a-package scheme whereby 32 silicon-germanium (SiGe), transmit/receive integrated-circuit (TRIC) modules have been flip-chip bonded to the array board. Each SiGe TRIC drives a pair of s... View full abstract»

## Aims & Scope

The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt